Stingray
The 'Frozen ATPL' term has nothing to do with the job market, average or median experience before gaining employment in an airline on multi-crew aircraft, or anything else that differentiates the job market between countries.
It is simply a shorthand way to describe a certain minimum level of qualification & exam result ie CPL & IR + ATPL subjects, sufficient to allow the issue of an ATPL once the required minimum experience is met.
In Oz & (I think) USA we certainly have the 'Frozen ATPL' it's just that a pilot would just say s/he has a Commercial licence (certificate for the US
), instrument rating & has passed the ATP(L) exam(s).